Wrench.



J. M. BARNETT.

WRENCH.

APPLICATION FILED MAR. 15. 1915.

Patented Nov. 30, 1915.

m ggg i TJ'NTTED @TATE PATEN JOHN M. BARNETT, OF LAWRENCEVILLE, GEORGIA.

WRENCH.

Application filed March 15, 1915.

To all whom it may concern:

Be it known that 1, JOHN M. BARNETT, a citizen of the United States,residing at Lawreneeville, in the county of Gwinnett and State ofGeorgia, have invented certain new and useful Improvements in Wrenches;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

his invention relates to new and useful improvements in wrenches, andhas for its principal object to provide a quick-adjusting wrench whichmay be easily and quickly moved to the desired adjustment so as to fitnuts of different sizes.

Another object of the invention is to provide a device which will permitthe sliding jaw of the wrench to easily move to the desired position andwhich, when the handle is gripped and the wrench is in operation, willlock the jaw against movement.

A further object of the invention is to provide a wrench which whenreleased may be easily moved to fit nuts of larger or smaller diameter.

lVith these and other objects in view, the invention consists in thenovel combination and arrangement of parts which will be fully set forthin the following specification and accompanying drawings, in which,

Figure 1 is a side view in elevation of a wrench constructed inaccordance with this invention. Fig. 2 is a longitudinal partlysectional view thereof, taken approximately on the line 22 of Fig. 3.Fig. 3 is a transverse sectional view taken on line 33 of- Fig. 2 withthe jaws omitted.

Referring to the drawings by characters of reference, the numeral 1designates the shank of the wrench which is formed at one end with thehead 2. This head is provided with the projection 3 which is formed withthe jaw face 4:. The reduced extension 5 is formed at the end of theshank 1 opposite the head 2 and is provided with a plurality ofoppositely disposed notches 6, which form ribs 7 which cooperate inholding the slidable jaw in various adjusted positions. A suitable head8 is carried at the extreme outer end of the reduced extension 5 and isdesigned to limit the downward movement of the slidable jaw to preventthe same from becoming displaced.

Specification of Letters Patent.

Serial No. 14,470.

The slidable jaw, designated generally by the numeral 9, comprises thesleeve 10 having formed thereon at one end the angular extension llwhiohis provided with the jaw face 12, which cooperates with the jaw face 41n gripping the article to be turned. This sleeve 10 is formed with theopposed openings 13 and has formed integral therewith the enlargement 1dat the end opposite the jaw 9, which is recessed as at 15 for thereception of the gripping portions which will be more fully hereinafterdescribed.

The gripping portions hereinbefore referred to comprise the bodies 16which are U-shaped in transverse cross section and are pivoted in therecesses 15 in the enlargement 1 1 as at 17. Carried by the grippingportions are the leaf springs 18, which are designed to bear against theshank 1 and force the gripping portions open and into the positionillustrated in the drawings. Formed at the extreme outer ends of each ofthe gripping portions are the angular extensions 19, each of which isformed with an opening 20, one wall of which is provided with the edge21 which engages in the notches 6 to abut the ribs 7 and thereby lockthe jaw against movement. One of the extensions 19 is formed with theflange 22 which is designed to limit the outward movement of the same.

It will be apparent from the foregoing that in use when it is desired toadjust the sliding jaw of the wrench, the same is moved so that itengages the surface of the nut to be turned and upon gripping themembers 16 it will be apparent that the edges 21 will engage in thenotches 6 and abut the ribs 7, thereby locking the jaws againstmovement. The harder the pull on the wrench,

the greater will be the gripping action, and

it will be evident that the jaws will be more firmly held againstrelative movement. When it is desired to adjust the wrench to adifferent size of nut or other article to be turned, it is apparent thatthe gripping portions are released and the jaws spread to the properposition, and upon grasping the gripping portions 16 it will be apparentthat the edges 21 will engage a different portion of the reducedextension 5.

While in the foregoing there has been shown and described the preferredembodiment of this invention, it is to be understood that such changesmay be made in the combination and arrangement of parts as will fallwithin the spirit and scope of the invention as claimed.

What is claimed is:

1. A wrench of the class described comrisin a shank a stationar awformed on b one end of the shank, a reduced extension formed at theopposite end of the shank and provided with a plurality of teeth, asleeve slidable on the shank, a movable jaw carried by the sleeve,gripping members having one of their ends inturned, pivotally secured tothe lower end of the sleeve and positioned on opposite sides of theshank, their inturned ends cooperating with the teeth formed on thereduced end of the shank, springs connected to the gripping membershaving downwardly curved portions engaging the shank for normallyholding the gripping members out of engagement with the teeth.

2. A wrench of the class described comprising a shank, a stationary jawformed at one end of the shank, a sleeve slidably mounted over saidshank, a movable jaw formed at one end of said sleeve, the lower end ofsaid sleeve provided with a flange, inwardly formed recesses, grippingmembers pivotally secured in the recesses in the lower end of the sleeveand extending downwardly therefrom, angular extensions at the free endof the gripping members to engage teeth at the reduced portion of theshank and hold the sleeve and movable aw members stationary withrelation to the stationary aw member, and springs carried by thegripping members for engaging the shank to normally hold the grippingmembers out of engagement with the rib.

3. A wrench of the class described comprising a shank, a stationary jawformed on one end of the shank, a reduced extension formed attheopposite end of the shank and being provided with a plurality ofnotches forming teeth, a sleeve slidable on the shank, a movable jawcarried by the upper end of the sleeve, the lower end of the sleevebeing enlarged and provided with a recess, gripping members pivotallymounted in the recesses at the lower end of the sleeve, and extendingdownwardly therefrom, angular extensions at the free ends ofthe'gripping membersto engage around the reduced extension of the shankand engage the teeth to hold the sleeve and movable jaw membersstationary with relation to the stationary jaw member, and curvedsprings rigidly secured to the inner face of J. C. LANFORD, W. T.ROBERTS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

- Washington, D. C.

